orderBook method
Get Binance futures orderbook
Implementation
Future<Either<String, Orderbook>> orderBook({
required String symbol,
String? limit,
}) {
Map<String, String> params = {
'symbol': symbol,
};
if (limit != null) params['limit'] = limit;
return sendRequest(
path: 'fapi/v1/depth',
type: RequestType.GET,
params: params,
).then((r) => r.isLeft ? Left(r.left) : Right(Orderbook.fromMap(r.right)));
}